Bobbin-clutching means for rotatable spindles



J. A. MILLER BOBBIN CLUTCHING MEANS FOR ROTATABLE SPINDLES May 10, 1927.

' Filed Nov. 5, 1926 Illlllill) lnvenTor, Joseph A.Mi||er WWW/(M Patented May 10, 1927.

UNITED STATES PATENT-OFFICE.

JOSEPH A. MILLER'OI nornnn-nn, MASSACHUSETTS, Ass-xenon ro Dungeon-romrron, or HOPEDALE, ivrnssaontrs'nrrs, a eeaeonarion or MAINE.

BOBBIN-GLUTGHING MEANS Application filed November This invention relates to that type of spindle employed in spinning frames and similar machines and .in which bobbin clutching members are provided to fit within the base of the bobbin and to expand therein thus to maintain the bobbin in position during the spinning or other operation. More particularly, the invention relates to that type disclosed in the patent to Thompson, No. 893,760, July 21, 1908, wherein a plurality of elongated segmental bobbin clutching members surround the spindle blade and rotate therewith and are pressed radially outward by yielding or spring means.

It is the object of the present 1nvent1on to provide a similar construction in which g each bobbin clutching member is provided with a spring for effecting its radial outward movement and in which this spring is rigid with or rigidly secured to the bobbin clutching member, thus preventing the spring from becoming mispositioned and insuring its proper and similar action under all circumstances.

Theobject of the invention is further to provide a simple and efficient form of construction which may be readily and economically manufactured, which will be subject to as little wear as possible and in which there shall be no loose or movable parts which may become lost or mispositioned, and in which the pressure of the bobbin clutching members shall always be exerted symmetrically and evenly radially of the spindle.

These and other objects and features of the invention will appear more fully from the accompanying description and drawings and will be particularly pointed out in the claims.

As the general construction and'operation of this type of spindle is well known and familiar to those skilled in the art and is further disclosed in the aforesaid patent to Thompson, it will only be necessary here to illustrate and describe those parts directly concerned with the present invention.

In the drawings:

Fig. 1 is a view in side elevation of a portion of a spindle embodying a preferred form of the present invention.

Fig. 2 is a view on a larger scale partially broken away and partially in vernon no'rArA'BLn 'SPINDLES.

5, 1926. Serial No. 146,397.

the spindle and concentric with and ex A teriorly of this sleeve there is formed in the upper surface of the bobbin rest an an nular recess 5. p

A plurality of elongated segmental bobbin clutching members 6, all of Similar con= Struction, surround the spindle above the whirl and arefmounted to rotate with the spindle. At their lower ends these bobbin clutching members are provided with flanges or feet .7 seated in the recess 5 and held therein by a ring 8 sprung into place near the top of the recess. Spacing pins 9 serve to keep the bobbin clutching members separated and symmetrically disposed around the blade. The outward radial movement of the bobbin clutchingmembers is limited by the usual collar 10 driven on the spindle and provided with a depending annular flange 11 telescoping over upwardly entending flange sections 12 at the interior ofthe bobbin clutching members.

Each bobbin clutching member in this invention is provided with a spring located intermediate its ends and secured thereto and projecting radially inward therefrom and at its free end abutting the spindle blade. While this spring may take various forms, it is preferably, as shown, of a hairpin-like shape and formed of spring wire. The open end of the spring or the prongs 13, in the construction illustrated, are driven into holes drilled into the thickened portion of the clutch member from which the flange section 12 projects. The spring at its other or loop end 14 engages the surface of the spindle blade 1 at horizontally separated points intermediate and opposite the ends of the bobbin clutching member. It will be seen that the sprin from the point where it is secured to the bobbin clutching member extends radially inward toward the blade and this is preferably secured by causing the spring to extend longitudinally of the bobbin clutching member inwardly therefrom and at an acute angle thereto. The spring is also located symmetrically with respect to the central, radial, longitudinal plane both of the blade and of the bobbin clutching member so that its action will be symmetrical.

lVhen the parts are assembled and no bobbin is in position, the bobbin clutching mem" bers stand as shown in Figs. 1 and 2, held in their outermost radial position by the pressure of the sorings against the blade. lVhen the bobbin is placed in position, the bobbin clutching members move radially in Ward against the pressure exerted by the springs, thus firmly gripping the bobbin, and when the spindle is rotating, this gripping pressure is augmented by the action of centrifugal force.

It will thus be seen that it is impossible for the springs to become mispositioned or lost and furthermore, that the symmetrical. and equal action of the springs is secured under all circumstances. Thus the parts are subject to little wear and cannot get out of order or fail to perform their usual function as the result of wear or unless broken.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is:

1. A rotatable spindle comprising a blade, a plurality of elongated segmental bobbin clutching members surrounding the blade and rotatable therewith, means for limiting radial outward n'iovement of the ends of the bobbin clutching members. and a spring located intermediate the ends of each bobbin clutching member, secured thereto, projecting radially inward therefrom and abutting the blade.

2. A rotatable spindle comprising a blade,

a plurality of elongated segmental bobbin clutching members surrounding the blade and rotatable therewith, means for limiting radial outward movement of the ends of the bobbin clutching members, and a spring for L each bobbin clutching member yiel-dable radially of the blade, rigidly secured at one end to the member, and projecting inwardly therefrom and longitudinally thereof and engaging at its free end the blade intermediate the ends of the bobbin clutching member.

3. A rotatable spindle comprising a blade. a. plurality of elongated'segmental bobbin clutching members surrounding the blade and rotatable therewith, means for limiting radial outward movement of the ends of the bobbin clutching members, and a spring for each bobbin clutching member rigidly secured at one end thereto and projecting at an acute angle thereto to a point intermediate the ends thereof, .tlexible radially of the blade and engaging the blade at horizontally separated points symmetrical with respect to the central, radial, longitudinal plane of the blade and bobbin clutching member.

at. A rotatable spindle comprising a blade, a plurality of elongated segmental bobbin clutching members surrounding the blade and rotatable therewith, means for limiting radial outward movement of the ends of the bobbin clutching members, and a hairpin spring for each bobbin. clutching member rigidly secured at its open end to the mem her and projecting at an acute angle thereto with its loop end engaging the blade surface intermediate and opposite the ends of the bobbin clutching member and the said spring being located symmetrically with re spect to the central, radial, longitudinal plane of the blade and bobbin clutching member.

In testimony whereof, I have signed my name to this specification. I

JOSEPH A. MILLER. 

